Arm rest engagable mounting bracket



FIG. 1 is a top and front perspective view of an arm rest engagable mounting bracket showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view thereof; and

FIG. 5 is a rear elevational view thereof. 

The ornamental design for an arm rest engagable mounting bracket, as shown and described. 